Rookie Clutch Question?

[Sontag1]

I just want to start out by saying that I know how to turn a wrench, but I have limited experience with outboards. I have been a reading on this site for a while, but I have not posted much at all. OK, now that is out of the way....

I have the opportunity to buy a little 1977 2HP Evinrude for $100

It looks like it is in good shape overall, but the owner tells me that "the prop is not spinning equal to the rpm of the motor".
It appears to run just fine, and the prop does turn.

Do these little motors have a clutch?

 

[itsaboattime]

Re: Rookie Clutch Question?

I did some looking and I found this:

Evinrude Gearcase Parts for 1977 2hp 2702C Outboard Motor

Looks like there is a clutch that you may want to have a look at in the lower unit. I would say that if there is problems with that clutch, I wouldn't give him over $75 for it.

 

[Chinewalker]

Re: Rookie Clutch Question?

Nope. Direct drive. Couple things to check. First would be the drive pin - it's a thin piece of rod material that runs through the propshaft and seats in a groove in the prop hub. Those props also have a rubber shock absorber between the nylon hub and the outer prop casing. I suppose it could be slipping, but I've NEVER seen one do that.

Second thing I'd check would be the driveshaft splines. If the motor was improperly serviced in its past life, someone may have forgotten to grease the splines, which could allow the crankshaft splines to rust out. When the crank splines are worn enough, they'll slip over the driveshaft splines, causing them to wear as well. If the driveshaft splines show wear, this motor is likely toast without major reconstructive surgery (new crankshaft and driveshaft). It's relatively easy to check for this as the unit is only held on by two bolts.

 

[itsaboattime]

Re: Rookie Clutch Question?

Those props also have a rubber shock absorber between the nylon hub and the outer prop casing. I suppose it could be slipping, but I've NEVER seen one do that.

Chinewalker, Would this be parts 22 and 23 in the link I posted? I haven't seen this kind of lower unit before and I am learning myself. Gonna have to dwell on that diagram and figure out its method of operation.
Looks neat!

Edit: doesn't look like there is a reverse gear?

 

[Sontag1]

Re: Rookie Clutch Question?

Thanks guys for all the information. I knew it did not have a clutch in the sense of R-N-F.
I thought it might have some kind of centrifugal clutch.

The diagram really helped me to see what is going on in the drive train (Thanks itsaboattime).

I did a couple of quick searches, and it looks like the drive shaft and crankshaft will end up costing ~$200
Does that sound about right?

 

[Chinewalker]

Re: Rookie Clutch Question?

Yes, those are the parts.
You can buy several parts motors (yes, plural) for $200!!

These are about as simple as an outboard can be. Motor splined to shaft, shaft splined to gear, gear turns propshaft, propshaft turns prop. It's been awhile since I've had one apart, but I believe the big gear is more or less one with the propshaft, pinned, if I recall correctly. If for whatever reason that pin has sheared, that might also be the cause of the slippage... Bottom line, you won't know until you get it apart.

Seeing as how you haven't actually bought this motor yet, I'd approach it as a parts motor and wouldn't give more than $40-$50 for it. If the seller balks, walk away. There will be others...

 

[Sontag1]

Re: Rookie Clutch Question?

Well I made an offer, and he asked me to call him back after the 4th. He said that he wanted to try and get his asking price.

I would like to get the Evinrude and tear into it, and we will see next week if that will happen.

I was able to close a deal on a Martin 45 yesterday (that is running great).

I traded the owner a lawnmower I had gotten off the curb.
All it needed was a little TLC and it was running like a champ.
We both were very happy with the trade. :victorious:

Sooooooo I am not going to be too brokenhearted if I don't get the Evinrude. Thanks for all the good advice!!!

 

[gm280]

Re: Rookie Clutch Question?

Well I made an offer, and he asked me to call him back after the 4th. He said that he wanted to try and get his asking price.

I would like to get the Evinrude and tear into it, and we will see next week if that will happen.

I was able to close a deal on a Martin 45 yesterday (that is running great).


I traded the owner a lawnmower I had gotten off the curb.
All it needed was a little TLC and it was running like a champ.
We both were very happy with the trade. :victorious:

Sooooooo I am not going to be too brokenhearted if I don't get the Evinrude. Thanks for all the good advice!!!

Sounds like you came out on the good side of your trade. It still amazes me how many folks throw their lawn mowers to the curb when the can't start them. And like you, I have had a lot of them just need a little tinkering to get them running perfectly.... Keep us updated on the OB...

 

[Chinewalker]

Re: Rookie Clutch Question?

Make sure you run that Martin fat on the oil! 20:1 mix, 1 quart of oil to 5 gallons gas. They're about the smoothest running little kickers ever made with their poppet valve induction. And they idle down like nothing else. Enjoy!

 

[Sontag1]

Re: Rookie Clutch Question?

Make sure you run that Martin fat on the oil! 20:1 mix, 1 quart of oil to 5 gallons gas. They're about the smoothest running little kickers ever made with their poppet valve induction. And they idle down like nothing else. Enjoy!

It was running like a champ yesterday in the tank. I cannot wait to get it on my little 10' boat and in the water.
I was wondering about that mix. I saw that it was 3/4 pint to a gallon of fuel on the Larson Outboard site. Do they like a certain type of oil?

I have an old Yamaha G1 golf cart with a little 215CC 2 stroke (1982 vintage). It likes Quakerstate synthetic 10W30 believe it or not.

 

[Scurvy Knave]

Re: Rookie Clutch Question?

I think anything rated TCW3 will do.

 

[Chinewalker]

Re: Rookie Clutch Question?

Yep, TCW3 rated oil is the way to go. Synthetics may smoke less, but keep the ratio the same regardless of dino or synth...